package com.gdut.gulimall.cart.controller;

import com.gdut.common.constant.AuthServerConstant;
import com.gdut.gulimall.cart.interceptor.CartInterceptor;
import com.gdut.gulimall.cart.service.CartService;
import com.gdut.gulimall.cart.vo.Cart;
import com.gdut.gulimall.cart.vo.CartItem;
import com.gdut.gulimall.cart.vo.UserInfoTo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.List;
import java.util.concurrent.ExecutionException;

/**
 * @author Drifiter
 * @create 2021-10-21 20:52
 */
@Controller
public class CartController {


    @Autowired
    CartService cartService;

    @GetMapping("/currentUserCartItems")
    @ResponseBody
    public List<CartItem> getCurrentUserCartItems(){
        return cartService.getUserCartItems();
    }

    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId) {
        cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num) {
        cartService.changeItemCount(skuId, num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,
                            @RequestParam("check") Integer check) {

        cartService.checkItem(skuId, check);

        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 浏览器有一个cookie; user-key;标识用户身份,一个月后过期;
     * 如果第一次使用jd的购物车功能,都会给一个临时的用户身份;
     * 浏览器以后保存，每次访间都会带上这个cookie;
     * 登录:session有
     * 没登录:按照4ookie里面带来user-key来做。
     * 第一次:如果没有临时用户,帮忙创建—个临时用户。
     *
     * @param session
     * @return
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {

//        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
//        if (attribute == null){
//            //没登录获取临时购物车数据
//        } else {
//            //获取登录了的购物车
//        }

        //1、快速得到用户信息.,id, user-key
//        UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
//        System.out.println(userInfoTo);

        Cart cart = cartService.getCart();
        model.addAttribute("cart", cart);

        return "cartList";
    }

    /**
     * 添加商品到购物车
     *
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes attributes) throws ExecutionException, InterruptedException {

        cartService.addToCart(skuId, num);

        attributes.addAttribute("skuId", skuId);

        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }

    /**
     * 跳转到成功页
     *
     * @param skuId
     * @param model
     * @return
     */
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId, Model model) {
        //重定向到成功页面。再次查询购物车数据即可
        CartItem item = cartService.getCartItem(skuId);
        model.addAttribute("item", item);
        return "success";

    }

}
